Clutch Pedal Switch, Checking

Signal From Clutch Pedal Switch, Checking

Special tools, test equipment and auxiliary items
- Scan tool V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3B
- Test box V.A.G 1598/31
- Multimeter (Fluke 83 or equivalent)
- Adapter set V.A.G 1594
- Wiring diagram

Test conditions






- Fuses 5,10 and 29 must be OK
- The battery voltage must be at least 11.5 V
- All electrical consumers, e.g. lights and rear window heating must be switched off

Test sequence
- Connect the scan tool V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control module with the "Address word" 01. Connecting scan tool and selecting Engine Control Module (ECM). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/VAG 1551 Scan Tool", Testing and Inspection

Indicated on display

Rapid data transfer HELP
Select function XX

- Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.

Indicated on display

Read measuring value block
Input display group number XXX

- Press keys 0, 6 and 6 for "display group 66" and confirm with Q key.

Indicated on display (1-4 = Display zones)

Read measuring value block 66 ->
1 2 3 4

- Observe display in display zone 2 (2nd digit from left).
Specification: x 0 x x

- Depress clutch pedal fully and observe display in display zone 2.
Specification: x 1 x x

- Press the -> key.
- Press keys 0 and 6 for the "End output" function and confirm input with the Q key.
- Switch off ignition.

If the display does not change:
- Remove driver's storage compartment:
- Pull 2-pin connector off clutch pedal switch.






- Measure resistance between switch contacts 1 and 2. Specification:
- Clutch not depressed: max. 1.5 Ohms
- Clutch depressed: Infinity Ohms (no continuity)

If the specifications are not obtained:
- Replace clutch pedal switch (F36).

NOTE: Observe installation position of clutch pedal switch in bearing bracket upper assembly hole.

- Check DTC memory, if necessary, repair any malfunctions and then erase DTC memory, checking and erasing DTC memory. Refer to "Displaying, Reading and Erasing Trouble Codes/With Manufacturers Scan Tool/DTC Memory, Checking And Erasing", Testing and Inspection
- Read-out the readiness code. If the DTC memory has been erased or the engine control module was disconnected from permanent positive, the readiness code must be generated again.
Refer to "Monitors Trips and/or Drive Cycle/Displaying Readiness Code", Testing and Inspection
Refer to "Monitors Trips and/or Drive Cycle/Generating Readiness Code", Testing and Inspection

If the specifications are obtained:






- Connect multimeter to measure voltage between contact 1 and Ground.
- Switch on ignition.
Specification: min. 11.5 V

If the specification is not attained:
- Check wiring for open circuit between 2-pin connector contact 1 and central electrics using wiring diagram.

If the specification is obtained:
- Remove inner plenum chamber cover, left:






- Connect test box V.A.G 1598/31 to control module wiring harness. The engine control module is not connected by this action.






- Check wiring for open circuit between test box and 2-pin connector using wiring diagram.
Contact 2 + socket 39
Wire resistance: Max. 1.5 Ohms

If the specification is obtained:
- Additionally check wires for short to one another.
- Additionally check the wiring for short to battery positive or Ground.

If no wiring problem is detected:
- Replace Engine Control Module (ECM).